lxqt-qtplugin provides the library libqtlxqt to integrate Qt with LXQt.
With this plugin, all Qt-based programs can adopt settings of LXQt,
such as the icon theme.

To integrate Qt with LXQt, export the following environment variable:
QT_QPA_PLATFORMTHEME=lxqt

This lxqt-qtplugin SlackBuild provides qt5 support. For qt6 support,
please install lxqt-qt6plugin.
Both lxqt-qtplugin and lxqt-qt6plugin may be installed on the same
system.